QUICK-ACTING OPERATING AMPLIFIER ON BASIS OF "BENT" CASCODE Russian patent published in 2010 - IPC H03F3/45 

FIELD: radio engineering.

SUBSTANCE: operating amplifier on the basis of "bent" cascode includes inlet cascade (1) with enlarged range of active operation. Intermediate cascade on the first (2) and the second (3) output transistors (T) the bases of which are combined, and emitters are connected to electric power supply bus (4) through the first (5) and the second (6) low-ohmic resistors and connected to outputs (7) and (8) of inlet cascade (1). Output buffer cascade (9) the input of which is connected to corrective capacitor (10), output (11) of current mirror (CM) (12) and collector T (3). At that, input CM (12) is connected to collector T (2). To the diagram there introduced is the first (14) and the second (15) additional T the bases of which are connected to emitter T (2), the third (16) and the fourth (17) additional T the bases of which are connected to emitter T (3); at that, collectors T (15) and T (16) are connected to bases T (2) and T (3) and to additional bipole I₁₈, collector T is connected to collector T (3), collector T (17) is connected to output (11) of CM (12), and emitters of all additional T (14, 15, 16, 17) are connected to electric power supply bus (4).

EFFECT: increasing maximum rate of rise of output voltage.

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